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By feeding tryptophan to the marine-derived fungus  Aspergillus  sp. HNMF114 from the bivalve mollusk  Sanguinolaria chinensis , 3 new quinazoline-containing indole alkaloids, named aspertoryadins H–J ( 1 – 3 ), along with 16 known ones ( 4 – 19 ), were obtained. The structures of the new compounds were elucidated by the analysis of spectroscopic data combined with quantum chemical calculations of nuclear magnetic resonance (NMR) chemical shifts and electron capture detector (ECD) spectra. Structurally, compound  3  represents the first example of this type of compound, bearing an amide group at C-3. Compounds  10  and  16  showed potent α-glucosidase inhibitory activity with IC 50  values of 7.18 and 5.29 μM, and compounds  13  and  14  showed a clear activation effect on the ryanodine receptor from  Spodoptera frugiperda  (sfRyR), which reduced the [Ca 2+ ]  ER   by 37.1 and 36.2%, respectively.

Three New Quinazoline-Containing Indole Alkaloids From the Marine-Derived Fungus Aspergillus sp. HNMF114